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BUSINESS COMBINATIONS - Accrued Restructuring (Details) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2016
Dec. 31, 2015
Restructuring Reserve [Abstract]    
Restructuring charges, beginning balance $ 1,686 $ 0
IncreaseDecreaseInRestructuringReserve 0 2,858
PaymentsForRestructuring (1,036) (1,172)
Restructuring charges, ending balance 650 1,686
RestructuringReserveNoncurrent (576) (687)
Restructuring Reserve Current 74 $ 999
GoodwillPurchaseAccountingAdjustments $ 100